Obtunder.



J. B. SAPP.

OBTUNDER.

APPLIOATIQNAHLED JULY 1o, 1911.

Patented May 21, 1912.

www MMP' t @Mii/29H3 aumns ia. sary, or; emwnnnsrn, tornio.

@B11-runen Applipaun inea Jury ofwOhio,l have invented Lcertain new and useful Improvements in Qbtunders, 'f

uihxihy the following is a specification.

" This lnrentien ,plates to .elet-endete andI easier@ nbiet te provifle `improved devise ,0f .the fknt byfnv .end improved, ,means fer `manuele,t-

las the seme, ,for adjnstine-tl1enerts t@ the instrument; end for lirry ,the action olf @wellies the .morements pf ,the tarima parte will more rllillv enreeflfrem the elleung @Scripties eed .lie revies-,S-

enmheaqerrlpenyleg i s-enfeevetleefthe :left Slslo 'the instrument. (Eig, 2 isfa ,longitp dinal `seetion. Fig.

utensili/extending parte Sleeve-e0 iseillell slides a rod 1l, an below the sleeve o'rlstoclr `is e irefsessed -ffbQ-SS 41 211.1 which ,enesliiistlns mit '13 uns said Zreutbreilig @Quilted the iront end of a finger piece 15 which slidesvthroughthe :hole in the lower end of a guide piece 14: which is clamped `to ,the rod 11 by a soreyvk 2l, the piece lll being split vertically on its ,middle line to enable it to be clamped to the rodby the screw 241.]

Abeve fthe red, 1L11@the handle 112 Wardly extending tubular socket 20,

-14.-, and by turning the thumb nut the pluni keOrm ,thief l'., .JUIJUS B, SAIT, Q tzenl of the United States, 4residing atfClevep 1 Which Works transve @llereterized esneeelly' drawingseligure l thas l.a ferr:

lel to said rod, which socket receives the rear end thereof, and` eer `may lle@ essere@ er rtfectedier ristposesfl'hereinafter stated. l bearings l are prlrilsdue weer tif, M n' erlfl tlisrlitfersasbft-ilr AS allers .,esneielily 1,0 `has noeste@ klieren gaeeabjle with v'arte .i t rod 11. 7This ,com sistsfo" normally'holdsthe latch inuengaxgeriien kam h The enseen is .es fell-QW T0,

leermeester@ essen f f r1 r, gelate@ ,Iennresiieetlv ley sli plusser .by ,sierras @i the eut- I vances or' retract-s the same rto dec easegir increase the @realty Pf the arrlf Tliil the@ b ieri@ lllxisp dito' y e -Plleed 'elle the ,Peris .se [sie piece ,leere ,rsllesllzek with i f Hiv,

. t is P serle.; the te-9th, :heirs seid@ 4, nesiien eenreeieitly fbi' @freilich neuter sinressien in the r'ight""'hand4 side ,off-the', stogl reeel@ the Ltir ,ef tlreree Straelen? isii'n nreeefrslti released fby ,rssu're inthe then, ,whiletheistiuiienr i l1 e.; Jthe plurger dylanced tlie'pressiirewokf hall-elisir@ eren -r @#135, dr'aviing tliieghaiidlgaliidgsaidviir Mpiece toward each other. After this, additional pressure may be exerted if necessary, by turning the nut 9 in the proper direction. By means of the nut- 13 which screws on the finger piece 15 the distance of said iinger `piece from the handle may be adjusted, to suit hands of diierent sizes.

I am aware/y that syringes of this type is made and maintained byoompression of @5th Y -he nameea-Mweaaess; y iq, 191i. -jrseriai No.esmia Y l kso have been proposed in which the pressure Y the hand, but in the use of t-he device continuous compression must be maintained for several minutes, which in such devices causes the hand to become numb and the fingers cramped, in which condition the hand is unable to perform the delicate operations required; also, ordinary hand pressure is insufficient. With my instrument the preliminary pressure is made by compression of the hand, and an additional or high pressure is made by turning the thumb wheel, forcing the piston forward, and automatically maintaining the high pressure, which is very essential, without any additional effort on the part of the operator, leaving the hands and fingers in a natural condition, without having been strained or cramped.

What I claim as new is l. An instrument comprising' a stock, a barrel iXed thereto, a handle having a projecting guide rod on which the stock is slidable, a latch between the stock and rod, to lock the parts against movement, and a plunger connected to the handle and working in the barrel.

2. An instrument comprising a handle having a projecting guide, a' plunger connected to the handle, a barrel slidable on the guide and in which the plunger works, and means to lock the handle and barrel against relative movement.

iece being arran `ed in V3. An instrument comprising a stock, a barrel projecting therefrom, a finger piece connected to the stock, a handle having a guide on which thestock is slidable, and a plunger connected to the handle and working in the barrel, the handle and iinger position to be grasped for manipulation.

An instrument comprising a handle having a project-ing guide ro-d and a socket, a stock slidable on the rod, a barrel fixed to the stock, in line with the socket, a plunger the rear end of which fits in the socket and the front end of which works in the barrel,

and'means mounted on the socket to adjust the plunger in or out.

l 5.- An instrument comprising a handle havinga projecting guide rod and a socket, a stock slidable on the rod, a barrel fixed to the stock, in line with the socket, a plunger the rear end of which fits in the socket and the front end of which works in the barrel, and a nut mounted on the plunger at the end of the socket, to advance or retract the former, the plunger being threaded for a part of its length, to receive the nut.

6. An instrument comprising a handle having a projecting tubular socket, a plunger the rear end of which is slidable lengthwise in the socket, means to prevent rotation of the plunger, a nut mounted on a threaded part of the plunger at the front end of the socket, and a barrel in which the front end of the plunger works.

7. An instrument comprising a` handle having a projecting guide rod with a rack thereon, a plunger attached to the handle, a stock slidable on the rod, a latch carried by the socket and engageable with the rack to latch the stock to the rod, and a barrel fixed to the stock and in which the plunger works.

8. An instrument comprising a barrel, a handle slidably connected to the barrel, a plunger working in the barrel and attached to the handle, whereby it may be advanced or retracted by relative movement of the handle and barrel, and means to advance or retract the plunger independent of the relative movement of the barrel and handle.

9. An instrument comprising a barrel, a plunger working therein, a handle operatively connected to the plunger, to advance the same for initial pressure in the barrel, and means to advance the plunger independently of the handle, for additional pressure in the barrel.

10. An instrument comprising a barrel, a plunger working therein, a handle operatively connected to the plunger to advance the same for pressure in the barrel, means to secure the handle and barrel against relative movement, and means to advance the plunger with respect to the handle, farther into the barrel, for additional pressure therein. l

In testimony whereof, I do afl-ix my signature in presence of two witnesses.

JULIUS B. SAPP.

Witnesses:

J oI-IN A. BoMMi-IARDT, STEDMAN J. ROCKWELL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

